lean_workbook_plus_13015
ProvedProve that for all real numbers .
Preamble
import Mathlib.Analysis.Complex.Basic
Formal statement
theorem lean_workbook_plus_13015 (x y z: ℝ) : x ^ 2 + y ^ 2 + z ^ 2 ≥ x * y + x * z + y * z := by sorry
Source
Prove that for all real numbers .
import Mathlib.Analysis.Complex.Basic
theorem lean_workbook_plus_13015 (x y z: ℝ) : x ^ 2 + y ^ 2 + z ^ 2 ≥ x * y + x * z + y * z := by sorry